\begin{table}%t1 \caption{\label{tab1}Energy levels (in Ryd) of Cr {\sc viii} and their lifetimes (s). The complete table is available in electronic form at the CDS.} %\centering \small \begin{tabular}{rllrrrrrrrr} \hline \hline %&&&&&&&&&& \\[-8pt] Index & Configuration & Level & NIST & GRASP$^a$ & GRASP$^b$ & FAC$^c$ & HFR & CIV3 & MCHF & $\tau$ (GRASP) \\ \hline %&&&&&&&&&& \\[-8pt] 1 & 3s$^2$3p$^5$ & $^2$P$^{\circ}_{3/2 }$ & 0.00000 & 0.00000 & 0.00000 & 0.00000 & 0.00000 & 0.00000 & 0.00000 & ... \\ 2 & 3s$^2$3p$^5$ & $^2$P$^{\circ}_{1/2 }$ & 0.09014 & 0.09197 & 0.08948 & 0.08889 & 0.09012 & 0.09304 & 0.07978 & ... \\ 3 & 3s3p$^6$ & $^2$S$ _{1/2 }$ & 2.20586 & 2.19212 & 2.18914 & 2.19210 & 2.20585 & 2.16564 & 2.18887 & 3.275-10 \\ 4 & 3s$^2$3p$^4$($^3$P)3d & $^4$D$ _{7/2 }$ & & 3.00795 & 3.00227 & 2.98964 & 3.00843 & 2.99816 & 2.99631 & ... \\ 5 & 3s$^2$3p$^4$($^3$P)3d & $^4$D$ _{5/2 }$ & & 3.01006 & 3.00493 & 2.99230 & 3.01027 & 2.99826 & 2.99770 & 3.379-07 \\ 6 & 3s$^2$3p$^4$($^3$P)3d & $^4$D$ _{3/2 }$ & & 3.01719 & 3.01240 & 2.99975 & 3.01714 & 3.00510 & 3.00373 & 3.975-07 \\ 7 & 3s$^2$3p$^4$($^3$P)3d & $^4$D$ _{1/2 }$ & & 3.02469 & 3.01992 & 3.00726 & 3.02458 & 3.01184 & 3.01008 & 3.414-07 \\ 8 & 3s$^2$3p$^4$3d & $^4$F$ _{9/2 }$ & & 3.27134 & 3.26582 & 3.25074 & 3.23119 & 3.25260 & 3.23974 & ... \\ 9 & 3s$^2$3p$^4$($^1$D)3d & $^2$P$ _{1/2 }$ & & 3.29063 & 3.28614 & 3.26735 & 3.26472 & 3.25910 & 3.25057 & 4.025-09 \\ 10 & 3s$^2$3p$^4$($^3$P)3d & $^4$F$ _{7/2 }$ & & 3.30163 & 3.29592 & 3.28074 & 3.26006 & 3.28098 & 3.26574 & ... \\ 11 & 3s$^2$3p$^4$($^3$P)3d & $^4$F$ _{5/2 }$ & & 3.32280 & 3.31696 & 3.30181 & 3.28079 & 3.30120 & 3.28386 & 5.783-08 \\ 12 & 3s$^2$3p$^4$($^3$P)3d & $^4$F$ _{3/2 }$ & & 3.33383 & 3.32819 & 3.31302 & 3.29179 & 3.31186 & 3.29351 & 5.414-08 \\ 13 & 3s$^2$3p$^4$($^1$D)3d & $^2$P$ _{3/2 }$ & & 3.34285 & 3.33723 & 3.31830 & 3.31227 & 3.25992 & 3.29726 & 2.635-09 \\ 14 & 3s$^2$3p$^4$($^1$D)3d & $^2$D$ _{3/2 }$ & & 3.40472 & 3.40017 & 3.38198 & 3.35410 & 3.34134 & 3.36567 & 3.916-09 \\ 15 & 3s$^2$3p$^4$($^3$P)3d & $^4$P$ _{1/2 }$ & & 3.40936 & 3.40511 & 3.38612 & 3.35250 & 3.37940 & 3.36723 & 7.041-09 \\ 16 & 3s$^2$3p$^4$($^3$P)3d & $^4$P$ _{3/2 }$ & & 3.43465 & 3.42911 & 3.41002 & 3.37867 & 3.40218 & 3.38908 & 2.345-07 \\ 17 & 3s$^2$3p$^4$($^3$P)3d & $^4$P$ _{5/2 }$ & & 3.45072 & 3.44459 & 3.42600 & 3.39436 & 3.42952 & 3.40617 & 9.225-09 \\ 18 & 3s$^2$3p$^4$($^1$D)3d & $^2$D$ _{5/2 }$ & & 3.46343 & 3.45676 & 3.43757 & 3.40613 & 3.39216 & 3.41507 & 1.506-08 \\ 19 & 3s$^2$3p$^4$($^3$P)3d & $^2$F$ _{7/2 }$ & & 3.47342 & 3.46869 & 3.44938 & 3.40777 & 3.44534 & 3.42728 & ... \\ 20 & 3s$^2$3p$^4$3d & $^2$G$ _{9/2 }$ & & 3.53157 & 3.52441 & 3.50558 & 3.46733 & 3.50940 & 3.48188 & ... \\ 21 & 3s$^2$3p$^4$($^1$D)3d & $^2$G$ _{7/2 }$ & & 3.53749 & 3.53111 & 3.51189 & 3.47173 & 3.50960 & 3.48519 & ... \\ 22 & 3s$^2$3p$^4$($^3$P)3d & $^2$F$ _{5/2 }$ & & 3.55521 & 3.54848 & 3.52865 & 3.48377 & 3.52274 & 3.49723 & 1.075-07 \\ 23 & 3s$^2$3p$^4$($^1$D)3d & $^2$F$ _{5/2 }$ & & 3.80976 & 3.80451 & 3.77810 & 3.70917 & 3.76942 & 3.74314 & 1.229-08 \\ 24 & 3s$^2$3p$^4$($^1$D)3d & $^2$F$ _{7/2 }$ & & 3.83218 & 3.82546 & 3.79904 & 3.72963 & 3.79284 & 3.76305 & ... \\ 25 & 3s$^2$3p$^4$($^1$S)3d & $^2$D$ _{3/2 }$ & & 4.02877 & 4.02354 & 4.00623 & 3.97315 & 4.00296 & 3.96997 & 2.539-09 \\ 26 & 3s$^2$3p$^4$($^1$S)3d & $^2$D$ _{5/2 }$ & & 4.05002 & 4.04327 & 4.02637 & 3.99470 & 4.02818 & 3.98995 & 8.733-09 \\ 27 & 3s$^2$3p$^4$($^1$D)3d & $^2$S$ _{1/2 }$ & 4.20586 & 4.29910 & 4.29379 & 4.26933 & 4.20582 & 4.24612 & 4.28883 & 6.828-12 \\ 28 & 3s$^2$3p$^4$($^3$P)3d & $^2$P$ _{3/2 }$ & 4.36779 & 4.51370 & 4.50786 & 4.48741 & 4.36674 & 4.41910 & 4.43828 & 6.922-12 \\ 29 & 3s$^2$3p$^4$($^3$P)3d & $^2$P$ _{1/2 }$ & 4.40060 & 4.54672 & 4.53989 & 4.51947 & 4.39906 & 4.51274 & 4.46807 & 7.049-12 \\ 30 & 3s$^2$3p$^4$($^3$P)3d & $^2$D$ _{5/2 }$ & 4.44498 & 4.57650 & 4.57055 & 4.54590 & 4.44695 & 4.49052 & 4.52641 & 5.863-12 \\ 31 & 3s$^2$3p$^4$($^3$P)3d & $^2$D$ _{3/2 }$ & 4.52143 & 4.65391 & 4.64582 & 4.62129 & 4.52174 & 4.56848 & 4.59374 & 5.935-12 \\ ..... \\ 99 & 3s$^2$3p$^4$4s & $^4$P$ _{5/2 }$ & 6.70583 & 7.01010 & 7.00559 & 6.94473 & & 6.70988 & 6.70024 & 2.102-09 \\ 100 & 3s$^2$3p$^3$($^2$P)3d$^2$($^1$D) & $^2$P$^{\circ}_{3/2 }$ & & 7.01368 & 7.00466 & 6.97699 & & & & 3.958-11 \\ 101 & 3s$^2$3p$^3$($^2$P)3d$^2$($^3$P) & $^2$S$^{\circ}_{1/2 }$ & & 7.02953 & 7.02003 & 7.02380 & & & & 1.017-10 \\ 102 & 3s$^2$3p$^3$($^2$P)3d$^2$($^3$F) & $^4$D$^{\circ}_{1/2 }$ & & 7.04823 & 7.03946 & 6.99751 & & & & 4.229-11 \\ 103 & 3s$^2$3p$^3$($^2$D)3d$^2$($^1$G) & $^2$I$^{\circ}_{11/2}$ & & 7.05337 & 7.04235 & 7.01573 & & & & 8.262-09 \\ 104 & 3s$^2$3p$^3$($^2$P)3d$^2$($^3$F) & $^4$D$^{\circ}_{3/2 }$ & & 7.05341 & 7.04418 & 7.01267 & & & & 6.126-11 \\ 105 & 3s$^2$3p$^3$($^4$S)3d$^2$($^1$S) & $^4$S$^{\circ}_{3/2 }$ & & 7.06035 & 7.05015 & 7.02852 & & & & 1.131-10 \\ 106 & 3s$^2$3p$^3$($^2$D)3d$^2$ & $^2$I$^{\circ}_{13/2}$ & & 7.06056 & 7.04813 & 7.02155 & & & & ... \\ 107 & 3s$^2$3p$^4$4s & $^4$P$ _{3/2 }$ & 6.75304 & 7.06194 & 7.05644 & 6.99476 & & 6.75720 & 6.74455 & 2.056-10 \\ 108 & 3s$^2$3p$^3$($^2$P)3d$^2$($^3$F) & $^4$D$^{\circ}_{5/2 }$ & & 7.06426 & 7.05454 & 7.03544 & & & & 6.803-11 \\ 109 & 3s$^2$3p$^3$($^2$P)3d$^2$($^3$P) & $^4$D$^{\circ}_{7/2 }$ & & 7.08635 & 7.07558 & 7.05870 & & & & 6.157-11 \\ 110 & 3s$^2$3p$^3$($^2$D)3d$^2$($^3$P) & $^2$D$^{\circ}_{3/2 }$ & & 7.08934 & 7.07931 & 7.05580 & & & & 7.285-11 \\ 111 & 3s$^2$3p$^4$4s & $^4$P$ _{1/2 }$ & & 7.09343 & 7.08321 & 7.02399 & & 6.92378 & 6.77862 & 6.835-11 \\ ..... \\ 120 & 3s$^2$3p$^4$4s & $^2$P$ _{3/2 }$ & 6.83122 & 7.16755 & 7.16197 & 7.10281 & & 6.83568 & 6.82721 & 1.580-11 \\ 121 & 3s$^2$3p$^3$($^2$D)3d$^2$($^3$F) & $^2$G$^{\circ}_{7/2 }$ & & 7.17941 & 7.16870 & 7.14514 & & & & 4.354-10 \\ 122 & 3s$^2$3p$^3$($^2$D)3d$^2$($^3$F) & $^2$G$^{\circ}_{9/2 }$ & & 7.21661 & 7.20404 & 7.18137 & & & & 6.153-10 \\ 123 & 3s$^2$3p$^4$4s & $^2$P$ _{1/2 }$ & 6.88681 & 7.22889 & 7.22211 & 7.16096 & & 6.88930 & 6.88565 & 1.449-11 \\ ..... \\ 136 & 3s$^2$3p$^4$4s & $^2$D$ _{5/2 }$ & 7.00983 & 7.35910 & 7.35294 & 7.28842 & & 7.01826 & 7.00509 & 4.092-11 \\ 137 & 3s$^2$3p$^4$4s & $^2$D$ _{3/2 }$ & 7.01266 & 7.36204 & 7.35577 & 7.29131 & & 7.02112 & 7.00721 & 3.664-11 \\ ..... \\ 166 & 3s$^2$3p$^4$4s & $^2$S$ _{1/2 }$ & 7.33807 & 7.74419 & 7.73815 & 7.55825 & & 7.35462 & & 2.778-11 \\ ..... \\ 219 & 3p$^6$3d & $^2$D$ _{3/2 }$ & & 8.25811 & 8.24865 & 8.15304 & & 8.40326 & & 1.528-10 \\ 220 & 3s$^2$3p$^4$($^1$D)4p & $^2$P$^{\circ}_{3/2 }$ & & 8.26219 & 8.25586 & 8.22228 & & & & 2.206-11 \\ 221 & 3p$^6$3d & $^2$D$ _{5/2 }$ & & 8.27295 & 8.26233 & 8.16644 & & 8.41904 & & 1.509-10 \\ ..... \\ 270 & 3s$^2$3p$^4$($^3$P)4d & $^4$D$ _{7/2 }$ & & 8.86388 & 8.85633 & 8.80087 & & 8.83874 & & 1.577-10 \\[2pt] \hline 271 & 3s$^2$3p$^4$($^3$P)4d & $^4$D$ _{5/2 }$ & & 8.86828 & 8.86087 & 8.80545 & & 8.83024 & & 1.515-10 \\ 272 & 3s$^2$3p$^4$($^3$P)4d & $^4$D$ _{3/2 }$ & & 8.87760 & 8.87022 & 8.81477 & & 8.87244 & & 1.433-10 \\ 273 & 3s$^2$3p$^4$($^3$P)4d & $^4$D$ _{1/2 }$ & & 8.88930 & 8.88167 & 8.82594 & & 8.88860 & & 1.484-10 \\ 274 & 3s$^2$3p$^4$4d & $^4$F$ _{9/2 }$ & & 8.95265 & 8.94596 & 8.89118 & & 8.89764 & & 1.551-10 \\ 275 & 3s$^2$3p$^4$($^3$P)4d & $^2$D$ _{5/2 }$ & 8.62241 & 8.96267 & 8.95610 & 8.90234 & & 8.65132 & & 2.112-11 \\ 276 & 3s$^2$3p$^4$($^3$P)4d & $^2$F$ _{7/2 }$ & & 8.96399 & 8.95772 & 8.90447 & & 8.90028 & & 1.582-10 \\ 277 & 3s$^2$3p$^4$($^3$P)4d & $^2$D$ _{3/2 }$ & 8.63243 & 8.96757 & 8.96095 & 8.90648 & & 8.65690 & & 2.464-11 \\ 278 & 3s$^2$3p$^4$($^3$P)4d & $^4$P$ _{1/2 }$ & & 8.97916 & 8.97294 & 8.91507 & & 8.96910 & & 8.401-11 \\ 279 & 3s3p$^4$($^3$P)3d$^2$($^3$P) & $^4$D$ _{3/2 }$ & & 8.99027 & 8.97865 & 8.92459 & & & & 1.327-10 \\ 280 & 3s3p$^4$($^3$P)3d$^2$($^3$P) & $^4$D$ _{5/2 }$ & & 8.99103 & 8.97905 & 8.92371 & & & & 1.436-10 \\ 281 & 3s3p$^4$($^3$P)3d$^2$($^3$P) & $^4$D$ _{1/2 }$ & & 8.99206 & 8.98054 & 8.92823 & & & & 1.221-10 \\ 282 & 3s3p$^4$($^3$P)3d$^2$($^3$P) & $^4$D$ _{7/2 }$ & & 8.99959 & 8.98660 & 8.93246 & & & & 1.473-10 \\ 283 & 3s3p$^4$($^3$P)3d$^2$($^1$G) & $^4$H$ _{13/2}$ & & 9.00131 & 8.98826 & 8.96165 & & & & 2.045-10 \\ 284 & 3s$^2$3p$^4$($^3$P)4d & $^2$P$ _{1/2 }$ & & 9.01178 & 9.00510 & 8.94690 & & 9.01062 & & 8.221-11 \\ 285 & 3s$^2$3p$^4$($^3$P)4d & $^4$P$ _{3/2 }$ & & 9.01197 & 9.00438 & 8.94869 & & 8.98184 & & 8.859-11 \\ 286 & 3s$^2$3p$^4$($^3$P)4d & $^4$F$ _{7/2 }$ & & 9.01532 & 9.00733 & 8.95233 & & 8.94968 & & 1.604-10 \\ 287 & 3s$^2$3p$^4$($^3$P)4d & $^4$F$ _{5/2 }$ & & 9.01822 & 9.01025 & 8.95157 & & 8.94094 & & 8.704-11 \\ 288 & 3s3p$^4$($^3$P)3d$^2$($^1$G) & $^4$H$ _{11/2}$ & & 9.02525 & 9.01214 & 8.98574 & & & & 1.818-10 \\ 289 & 3s$^2$3p$^4$($^3$P)4d & $^4$F$ _{3/2 }$ & & 9.03009 & 9.02211 & 8.95148 & & 8.95214 & & 1.385-10 \\ 290 & 3s$^2$3p$^4$($^3$P)4d & $^4$P$ _{5/2 }$ & & 9.03853 & 9.02997 & 8.95443 & & 9.00632 & & 1.112-10 \\ 291 & 3s3p$^4$($^3$P)3d$^2$($^1$G) & $^4$H$ _{9/2 }$ & & 9.04147 & 9.02848 & 9.00204 & & & & 1.615-10 \\ 292 & 3s3p$^4$($^1$D)3d$^2$($^1$D) & $^2$D$ _{5/2 }$ & & 9.05060 & 9.03969 & 9.00277 & & & & 1.383-10 \\ 293 & 3s3p$^4$($^3$P)3d$^2$($^1$G) & $^4$H$ _{7/2 }$ & & 9.05199 & 9.03925 & 9.01242 & & & & 1.460-10 \\ 294 & 3s3p$^4$($^1$D)3d$^2$($^1$D) & $^2$D$ _{3/2 }$ & & 9.05262 & 9.04048 & 9.00580 & & & & 1.247-10 \\ 295 & 3s$^2$3p$^4$($^3$P)4d & $^2$F$ _{5/2 }$ & & 9.05574 & 9.04601 & 8.97359 & & 8.98056 & & 7.960-11 \\ 296 & 3s3p$^4$($^1$D)3d$^2$($^1$D) & $^2$S$ _{1/2 }$ & & 9.05578 & 9.04431 & 8.95466 & & & & 1.613-10 \\ 297 & 3s3p$^4$($^3$P)3d$^2$($^3$P) & $^4$P$ _{5/2 }$ & & 9.06596 & 9.05402 & 8.99001 & & & & 1.186-10 \\ 298 & 3s3p$^4$($^3$P)3d$^2$($^3$P) & $^4$P$ _{3/2 }$ & & 9.07044 & 9.05819 & 8.96491 & & & & 1.240-10 \\ 299 & 3s$^2$3p$^4$($^3$P)4d & $^2$P$ _{3/2 }$ & & 9.07285 & 9.06487 & 9.00931 & & 9.01832 & & 5.056-11 \\ ..... \\ 309 & 3s$^2$3p$^4$($^1$D)4d & $^2$S$ _{1/2 }$ & 8.80648 & 9.16760 & 9.15897 & 9.09900 & & 8.78444 & & 2.257-11 \\ ..... \\ 317 & 3s$^2$3p$^4$($^1$D)4d & $^2$P$ _{3/2 }$ & 8.84476 & 9.19756 & 9.18967 & 9.12789 & & 8.80734 & & 2.170-11 \\ 318 & 3s3p$^4$($^3$P)3d$^2$($^1$G) & $^4$F$ _{7/2 }$ & & 9.20634 & 9.19462 & 9.14589 & & & & 1.020-10 \\ 319 & 3s$^2$3p$^4$4d & $^2$G$ _{9/2 }$ & & 9.21252 & 9.20348 & 9.14798 & & 9.15444 & & 1.538-10 \\ 320 & 3s$^2$3p$^4$($^1$D)4d & $^2$G$ _{7/2 }$ & & 9.21377 & 9.20407 & 9.15324 & & 9.15070 & & 1.613-10 \\ 321 & 3s$^2$3p$^4$($^1$D)4d & $^2$P$ _{1/2 }$ & 8.85934 & 9.21960 & 9.21131 & 9.14875 & & 8.82248 & & 1.822-11 \\ 322 & 3s$^2$3p$^3$($^4$S)3d$^2$($^3$P) & $^2$P$^{\circ}_{1/2 }$ & & 9.22224 & 9.21142 & 9.15019 & & & & 3.170-12 \\ 323 & 3s3p$^4$($^3$P)3d$^2$($^1$G) & $^4$F$ _{9/2 }$ & & 9.22546 & 9.21206 & 9.16778 & & & & 1.050-10 \\ 324 & 3s$^2$3p$^4$($^1$D)4d & $^2$D$ _{5/2 }$ & 8.89488 & 9.25486 & 9.24711 & 9.18328 & & 8.91134 & & 3.380-11 \\ 325 & 3s3p$^4$($^3$P)3d$^2$($^3$F) & $^4$D$ _{1/2 }$ & & 9.25999 & 9.24918 & 9.17270 & & & & 2.575-11 \\ 326 & 3s3p$^4$($^3$P)3d$^2$($^3$F) & $^4$D$ _{3/2 }$ & & 9.26889 & 9.25846 & 9.16726 & & & & 2.572-11 \\ 327 & 3s$^2$3p$^4$($^1$D)4d & $^2$D$ _{3/2 }$ & 8.90672 & 9.27099 & 9.26228 & 9.20047 & & 8.93064 & & 2.308-11 \\ 328 & 3s3p$^4$($^3$P)3d$^2$($^3$F) & $^4$D$ _{5/2 }$ & & 9.28727 & 9.27519 & 9.20264 & & & & 2.441-11 \\ 329 & 3s3p$^4$($^1$D)3d$^2$($^1$D) & $^2$P$ _{3/2 }$ & & 9.30001 & 9.28830 & 9.18837 & & & & 1.300-10 \\ 330 & 3s$^2$3p$^4$($^1$D)4d & $^2$F$ _{5/2 }$ & & 9.30809 & 9.30049 & 9.24353 & & 9.22832 & & 1.288-10 \\ 331 & 3s3p$^4$($^3$P)3d$^2$($^1$S) & $^4$P$ _{5/2 }$ & & 9.30862 & 9.29733 & 9.24515 & & & & 1.344-10 \\ 332 & 3s3p$^4$($^3$P)3d$^2$($^3$F) & $^4$D$ _{7/2 }$ & & 9.31165 & 9.29934 & 9.22694 & & & & 2.367-11 \\ 333 & 3s$^2$3p$^4$($^1$D)4d & $^2$F$ _{7/2 }$ & & 9.31292 & 9.30412 & 9.24767 & & 9.23432 & & 1.351-10 \\ ..... \\ 362 & 3s3p$^4$($^1$D)3d$^2$($^3$P) & $^2$F$ _{5/2 }$ & & 9.59008 & 9.57752 & 9.47455 & & & & 6.016-11 \\[2pt] \hline \end{tabular} \medskip NIST: \url{http://physics.nist.gov/PhysRefData}; $a$: Coulomb energies from the GRASP code; $b$: QED corrected energies from the GRASP code; $c$: energies from the FAC code; HFR: energies of Fawcett (\cite{bcf1}) from the HFR code; CIV3: energies of Mohan et~al. (2005) from the CIV3 code; MCHF: energies of Froese~Fischer et~al. (\cite{cff}) from the MCHF~code. \end{table}